================================================================== BUG: KCSAN: data-race in check_kill_permission / get_signal write to 0xffff88810a2ab02c of 4 bytes by task 21396 on cpu 1: get_signal+0xd12/0x14e0 kernel/signal.c:2757 arch_do_signal_or_restart+0x2a/0x270 arch/x86/kernel/signal.c:789 handle_signal_work kernel/entry/common.c:147 [inline] exit_to_user_mode_loop kernel/entry/common.c:171 [inline] exit_to_user_mode_prepare+0x11a/0x1b0 kernel/entry/common.c:208 __syscall_exit_to_user_mode_work kernel/entry/common.c:290 [inline] syscall_exit_to_user_mode+0x20/0x40 kernel/entry/common.c:301 do_syscall_64+0x45/0x80 arch/x86/entry/common.c:56 entry_SYSCALL_64_after_hwframe+0x44/0xae read to 0xffff88810a2ab02c of 4 bytes by task 8397 on cpu 0: check_kill_permission+0x44/0x2d0 kernel/signal.c:838 group_send_sig_info kernel/signal.c:1414 [inline] kill_pid_info+0x4e/0x100 kernel/signal.c:1452 kill_proc_info kernel/signal.c:1469 [inline] kill_something_info kernel/signal.c:1566 [inline] __do_sys_kill kernel/signal.c:3687 [inline] __se_sys_kill+0xd3/0x450 kernel/signal.c:3681 __x64_sys_kill+0x2d/0x40 kernel/signal.c:3681 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xae Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 8397 Comm: syz-executor.2 Not tainted 5.12.0-rc4-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================